eBay Error 21916924: Payment Instructions cannot be revised if the item has bid or active Best Offers or is ending in 12 hours.

Why this happens

The payment details or policy was changed, but eBay temporarily blocked this action to protect buyers who are actively engaged in purchasing your item (or to prevent changes from occurring immediately before the listing ends). Why eBay enforces this: Payment instructions are part of the terms buyers accept. eBay locks them while there are bids, offers or less than 12 hours left. When it usually happens: It usually appears when payment instructions in a template are updated and pushed to active auctions.

How to fix it

This error in other languages

German: Zahlungshinweise können nicht bearbeitet werden, wenn für den Artikel Gebote oder aktive Preisvorschläge vorliegen oder das Angebot innerhalb von 12 Stunden endet. French: Les instructions de paiement ne peuvent pas être modifiées si l'objet a reçu des enchères ou des offres actives, ou s'il se termine dans les 12 heures. Italian: Le istruzioni di pagamento non possono essere modificate se l'oggetto ha ricevuto offerte o Proposte d'acquisto attive, o se scade entro 12 ore. Spanish: Las instrucciones de pago no se pueden modificar si el artículo tiene pujas o Mejores ofertas activas, o si finaliza en las próximas 12 horas.